Patents by Inventor Hiroshi Gotou

Hiroshi Gotou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11964495
    Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: April 23, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromi Sakaguchi, Itsuro Sasaki, Ayaka Tanaka, Naoto Shimura, Shunsuke Horie, Hiroshi Gotou, Yuta Nakamura
  • Patent number: 11954962
    Abstract: A main unit includes a cassette shelf, at least one transporting cassette holder that temporarily holds a cassette removed from the cassette shelf and to be transported to a drug receiver, at least one returning cassette holder that temporarily holds the cassette received from the drug receiver and to be returned to the cassette shelf, and a main cassette transporter that transports the cassette between the cassette shelf and the at least one transporting cassette holder, and between the cassette shelf and the at least one returning cassette holder.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: April 9, 2024
    Assignee: YUYAMA MFG. CO., LTD.
    Inventors: Akifumi Tanaka, Hidenori Tsuji, Satoshi Gotou, Hiroshi Ieda
  • Publication number: 20230303869
    Abstract: An ink discharging device contains an ink containing an organic solvent with an SP value of from 9.0 to 12.0, a white pigment, a polyurethane resin with a glass transition temperature Tg of 0 degrees C. or lower, and water, and an ink discharging unit including a nozzle plate including a liquid repellent layer containing a silicone resin, the ink discharging unit for discharging the ink, wherein the proportion of the organic solvent to the entire of the ink is from 0.5 to 2.5 percent by mass and the proportion of the white pigment to the entire of the ink is from 6 to 15 percent by mass.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: Ricoh Cpmpany, Ltd.
    Inventors: Daisuke Ozaki, Toshiyuki Kobashi, Hiroshi Gotou, Ayaka Tanaka, Juichi Furukawa
  • Publication number: 20230303872
    Abstract: An ink contains a coloring material, an organic solvent comprising an organic solvent A and a compound represented by the following Chemical Formula I and a resin, wherein the proportion of the entire of the coloring material and the solid content of the resin to the entire of the ink is 15 percent by mass or greater, wherein the organic solvent A contains a polyol with a boiling point of 180 degrees C. or higher and with an equilibrium moisture content of 36 percent by mass or greater at 23 degrees C. and 80 percent RH.
    Type: Application
    Filed: March 22, 2023
    Publication date: September 28, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi GOTOU, Toshiyuki Kobashi, Daisuke Ozaki
  • Patent number: 11649365
    Abstract: An ink contains an anionic compound, water, a photoacid generator, and one or more organic solvents containing at least one organic solvent having a solubility parameter of from 9 to 11.8 (J/cm3)1/2.
    Type: Grant
    Filed: July 2, 2021
    Date of Patent: May 16, 2023
    Assignee: Ricoh Company, Ltd.
    Inventor: Hiroshi Gotou
  • Publication number: 20230132661
    Abstract: A set of inkjet inks used for forming an image by application of an ink on a cloth is provided. The set includes an ink and a pre-processing fluid. The pre-processing fluid contains water, a compound that flocculates an anionic compound, and at least one emulsified sizing agent.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 4, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Daisuke Ozaki, Juichi Furukawa
  • Publication number: 20230120554
    Abstract: An ink set includes a white ink and a color ink. The white ink and the color ink each independently include water-dispersible resin particles, and a blocked isocyanate compound. A resin of the water-dispersible resin particles includes a crosslinkable functional group. The blocked isocyanate compound includes a functional group that can crosslink with the resin of the water-dispersible resin particles. An absolute value of a difference in static surface tension between the white ink and the color ink at 25° C. is 1.0 mN/m or less. Absolute values of differences in dynamic surface tension between the white ink and the color ink at 25° C. with bubble lifetime of 15 msec, a bubble lifetime of 150 msec, and a bubble lifetime of 1,500 msec are each independently 1.0 mN/m or less. The bubble lifetime is measured according to the maximum bubble pressure method.
    Type: Application
    Filed: September 14, 2022
    Publication date: April 20, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Tomohiro Hirade, Daisuke Ozaki
  • Patent number: 11603478
    Abstract: An ink contains water, an organic solvent, a polyurethane resin, and a cyclic ester including a structure represented by Chemical formula I, wherein the proportion of the cyclic ester having a crystal having a particle diameter of 1 ?m or greater is less than 4 ppm of the total of the ink after the ink is allowed to stand at a temperature range of from 20 to 30 degrees C. for 30 days.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: March 14, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Ayaka Tanaka, Hiromi Sakaguchi
  • Patent number: 11499062
    Abstract: An ink contains at least one kind of polyether-modified siloxane compound and at least one kind of aliphatic alcohol alkylene oxide compound.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: November 15, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Yoshiaki Masuda, Masahiko Ishikawa, Masaki Kudo, Kazuhiko Umemura, Keita Katoh, Akihiko Matsuyama, Masayasu Nonogaki, Takeshi Shibuya
  • Publication number: 20220298373
    Abstract: An ink set contains white ink and color ink, wherein the difference in static surface tension between the white ink and the color ink is 1.0 mN/m or less and each difference in dynamic surface tension between the white ink and the color ink at each bubble life time of 15 msec, 150 msec, and 1,500 msec at 25 degrees C. is 1.0 mN/m or less as measured by maximum bubble pressure technique.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 22, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Juichi Furukawa, Daisuke Ozaki
  • Publication number: 20220289993
    Abstract: A processing fluid contains an alcohol having an amino group and a polyvalent metal salt, wherein the processing fluid is applied to fabric.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 15, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Daisuke Ozaki, Hiroshi Gotou, Toshiyuki Kobashi, Juichi Furukawa
  • Publication number: 20220282107
    Abstract: A processing fluid contains a resin having an amino group and an amine value of from 200 to 1,200 mgKOH/g and a polyvalent metal salt, wherein the proportion of the resin to the processing fluid is from 0.01 to 10 percent by mass and the processing fluid is applied to the fabric.
    Type: Application
    Filed: February 28, 2022
    Publication date: September 8, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Daisuke OZAKI, Toshiyuki Kobashi, Hiroshi Gotou, Juichi Furukawa
  • Patent number: 11292932
    Abstract: An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-?-buthoxy propionamide, N,N-dimethyl-?-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: April 5, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuki Yokohama, Hiroshi Gotou, Kaori Toyama, Masayuki Fukuoka
  • Patent number: 11235609
    Abstract: A method for printing is provided including: applying a pretreatment liquid containing a compound that aggregates an anionic compound on a print medium, and applying an ink containing water, an organic solvent, and a resin particle on the print medium to which the pretreatment liquid has been applied. The resin particle includes a polyurethane resin particle. The ink contains a cyclic ester having a structure represented by the following general formula (I). After the ink is left to stand and stored under a room temperature environment (25±5° C.) for a month, a rate of content of crystals of the cyclic ester having a particle diameter of 1 ?m or larger in the ink is lower than 4 ppm.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: February 1, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventor: Hiroshi Gotou
  • Publication number: 20220024217
    Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.
    Type: Application
    Filed: January 21, 2020
    Publication date: January 27, 2022
    Inventors: Hiromi SAKAGUCHI, Itsuro SASAKI, Ayaka TANAKA, Naoto SHIMURA, Shunsuke HORIE, Hiroshi GOTOU, Yuta NAKAMURA
  • Publication number: 20220017764
    Abstract: An ink contains an anionic compound, water, a photoacid generator, and one or more organic solvents containing at least one organic solvent having a solubility parameter of from 9 to 11.8 (J/cm3)1/2.
    Type: Application
    Filed: July 2, 2021
    Publication date: January 20, 2022
    Inventor: Hiroshi GOTOU
  • Patent number: 11130349
    Abstract: An ink including water, an organic solvent, and a polyurethane resin particle is provided. A rate of content of a compound having a molecular weight of 1,000 or less and having a structure represented by the following general formula (I) in the ink is 10 ppm or less.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: September 28, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromi Sakaguchi, Hiroshi Gotou, Itsuro Sasaki, Ayaka Tanaka
  • Publication number: 20210155012
    Abstract: An inkjet printing device includes an ink container accommodating a clear ink containing a resin and an organic solvent, a discharging head including a nozzle plate, the discharging head being configured to discharge the clear ink onto a substrate to form a printing layer on the substrate, and a heating device configured to heat the substrate, wherein the heating device heats the substrate satisfying the following relationship: Tmatte (degrees C.)>Tgloss (degrees C.), where Tmatte represents a temperature of the substrate in a first printing region when the clear ink is attached to the substrate in a first printing mode and Tgloss represents a temperature of the substrate in a second printing region when the clear ink is attached to the substrate in a second printing mode, wherein the receding contact angle of the clear ink against the nozzle plate is 35 degrees or greater.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 27, 2021
    Inventors: Hiroshi GOTOU, Hiroaki TAKAHASHI, Yuta NAKAMURA, Yuusuke KOIZUKA, Ayaka TANAKA
  • Patent number: 11001075
    Abstract: A printing method includes discharging a first white ink comprising a first white pigment and a second white ink containing a second white pigment by a discharging head, wherein the following relationship is satisfied: |RA?RB|?0.5, where RA represents a refractive index of the first white pigment and RB represents a refractive index of the second white pigment.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: May 11, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Tomohiro Hirade
  • Publication number: 20200391533
    Abstract: A method for printing is provided including: applying a pretreatment liquid containing a compound that aggregates an anionic compound on a print medium, and applying an ink containing water, an organic solvent, and a resin particle on the print medium to which the pretreatment liquid has been applied. The resin particle includes a polyurethane resin particle. The ink contains a cyclic ester having a structure represented by the following general formula (I). After the ink is left to stand and stored under a room temperature environment (25±5° C.) for a month, a rate of content of crystals of the cyclic ester having a particle diameter of 1 ?m or larger in the ink is lower than 4 ppm.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 17, 2020
    Inventor: Hiroshi GOTOU